StenniSphere, the visitor center at NASA's Stennis Space Center near Bay St. Louis, Miss., will be closed Monday, July 4, in observance of Independence Day. StenniSphere will resume normal operations Tuesday, July 5, at 10 a.m.

StenniSphere is open daily until 5 p.m. Public tours begin at 10 a.m., and group tours with their own transportation can have earlier admittance.

Stennis Space Center is America's largest rocket engine test complex, where every Space Shuttle Main Engine is test fired and proven flight-worthy. StenniSphere offers fun, educational, interactive exhibits, presentations and scientific demonstrations, the Space Odyssey gift shop and the RocKeTeria, a 1960s-style diner. Free tours begin at the Launch Pad, located at the Hancock County Welcome Center, I-10, Exit 2. All visitors age 18 and older must present a valid photo I.D., such as a driver's license or passport. For more information, call (228) 688-2370 or 1-800-237-1821 or visit: